Flatbed Scanner, A4 Scanning element: CIS Light source: 3-color (RGB) LED Optical resolution: 2400 x 2400dpi Selectable resolution: 25 - 19200dpi Interface: USB2.0 High-Speed Mini-B Scanning gradation (colour): 48 bit input -> 48/24 bit output Scanning gradation (greyscale): 16 bit input -> 8 bit output Maximum Document Size: A4 / Letter (216 x 297mm) EZ-Scan Buttons: 4 buttons (PDF, AUTOSCAN, COPY, SEND) Scanning speed: (colour) (Reflective) 14.8msec/line (2400 dpi) 6.6msec/line (1200 dpi) 3.8msec/line (600 dpi) 2.2msec/line (300 dpi) (greyscale, B&W) (Reflective） 4.3msec/line (2400 dpi) 2.2msec/line (1200 dpi) 1.3msec/line (600 dpi) 2.2msec/line (300 dpi) Scan speed (A4, 300dpi, Colour): Approx. 10 sec Scan speed (4x6", 300dpi, Colour): Approx. 5 sec Preview Speed: Approx. 9 sec Software Included: Scan Gear for Win Scan Utility for Win